Retainer and wear sleeve for rotating mining bits
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United States of America Patent
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-
Nov 27, 1984
Grant Date -
N/A
app pub date -
Jul 22, 1982
filing date -
Jul 22, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mining bit to be mounted for rotation in a bore of a support block or on a drill steel having a retention configuration opposite the working end. A bit shank is formed with an abutment flange at the insertion end and a recess adjacent said flange to receive flexed resilient fingers of a resilient retention ring during insertion of said ring in said bore. A fulcrum land supports an unsplit end of said ring. The resilient fingers carry an annular bulge projection which engages an annular recess in a support bore. The ring can extend the length of the retention shank to serve as a wear sleeve. With a drill steel, the retention ring is mounted on an extending insert to cooperate with a female recess in a hollow bit.
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